EEF-SX0D331R Equivalent & Substitute Parts

Part Overview

The EEF-SX0D331R is a 330 µF, 2 V aluminum polymer capacitor in the 2917 (7343 Metric) surface mount package manufactured by Panasonic Electronic Components. This part operates across a temperature range of -55°C to 105°C with a rated lifetime of 2000 hours at 105°C and is designated as Not For New Designs. Due to its obsolescence status, equivalent and substitute parts with improved specifications or active product status are available to support ongoing production and new design requirements.

Key Parameters

Parameter	Value
Capacitance	330 µF
Voltage Rating	2 V
Tolerance	±20%
Type	Aluminum Polymer
ESR (Equivalent Series Resistance)	9 mOhm
Lifetime @ Temperature	2000 Hrs @ 105°C
Operating Temperature Range	-55°C to 105°C
Package / Case	2917 (7343 Metric)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the EEF-SX0D331R is determined by the following criteria:

Voltage Rating Compatibility: Substitute parts must maintain equal or higher voltage ratings. Parts rated at 2.5 V are acceptable upgrades for 2 V applications.

Capacitance & Tolerance: All substitute parts maintain 330 µF capacitance with ±20% tolerance to ensure functional equivalence.

Package & Mounting: All substitutes use the 2917 (7343 Metric) surface mount package with identical footprint dimensions (0.287" L x 0.169" W / 7.30 mm x 4.30 mm).

ESR & Thermal Performance: Substitute parts maintain 2000 hour lifetime at 105°C. ESR values range from 3 mOhm to 15 mOhm depending on series selection, affecting ripple current handling capability.

Compliance & Status: All substitutes are ROHS3 compliant and REACH unaffected. Active product status substitutes are preferred over Not For New Designs variants.

Parameter Comparison

Part Number	Series	Voltage (V)	Capacitance (µF)	ESR (mOhm)	Height Max (mm)	Ripple Current @ 100 kHz (A)	Product Status
EEF-SX0D331R	SP-Cap SX	2	330	9	2.00	—	Not For New Designs
EEF-SX0E331ER	SP-Cap SX	2.5	330	9	2.00	6.3	Active
EEF-SX0E331R	SP-Cap SX	2.5	330	9	2.00	—	Not For New Designs
EEF-CX0D331R	SP-Cap CX	2	330	15	1.90	5.1	Active
EEF-GX0D331R	SP-Cap GX	2	330	3	2.00	10.2	Active
EEF-LX0D331R	SP-Cap LX	2	330	6	2.10	7.5	Active
EEF-LX0D331R4	SP-Cap LX	2	330	4.5	2.10	8.5	Active
EEF-SX0D331E4	SP-Cap SX	2	330	4.5	2.00	8.5	Active
EEF-SX0D331XE	SP-Cap SX	2	330	6	2.00	7.5	Active
EEF-SX0D331XR	SP-Cap SX	2	330	6	2.00	—	Not For New Designs
EEF-SX0D331ER	SP-Cap SX	2	330	9	2.00	6.3	Active

Engineering Selection Recommendations

For Direct Replacement (Same Voltage Rating): EEF-SX0D331ER is the primary parametric equivalent with identical electrical specifications (330 µF, 2 V, 9 mOhm ESR) and Active product status, making it suitable for production use.

For Voltage Upgrade Applications: EEF-SX0E331ER provides a voltage upgrade to 2.5 V while maintaining identical capacitance and ESR characteristics. This part is Active and recommended for new designs requiring enhanced voltage margin.

For Low ESR Requirements: EEF-GX0D331R (SP-Cap GX series, 3 mOhm ESR) and EEF-LX0D331R4 (SP-Cap LX series, 4.5 mOhm ESR) offer reduced ESR with higher ripple current capability (10.2 A and 8.5 A respectively at 100 kHz). Both are Active products suitable for high-frequency applications.

For Space-Constrained Designs: EEF-CX0D331R (SP-Cap CX series) provides the lowest seated height at 1.90 mm while maintaining 2 V rating and Active status, though with higher ESR (15 mOhm).

All recommended substitutes maintain ROHS3 compliance and REACH unaffected status consistent with the original part.

Frequently Asked Questions (FAQ)

Q: Can EEF-SX0E331ER replace EEF-SX0D331R directly? A: Yes. EEF-SX0E331ER is a parametric equivalent with identical capacitance (330 µF), tolerance (±20%), ESR (9 mOhm), and thermal rating (2000 Hrs @ 105°C). The 2.5 V rating is compatible with 2 V applications and provides additional voltage margin. Both use the 2917 (7343 Metric) package with identical footprints.

Q: What is the difference between SP-Cap SX, LX, GX, and CX series? A: These series differ primarily in ESR and ripple current performance. SP-Cap GX offers the lowest ESR (3 mOhm) with highest ripple current (10.2 A @ 100 kHz). SP-Cap LX provides mid-range performance (4.5–6 mOhm, 7.5–8.5 A). SP-Cap SX maintains standard performance (9 mOhm, 6.3 A). SP-Cap CX has higher ESR (15 mOhm) but lowest height (1.90 mm). All maintain identical capacitance and voltage ratings.

Q: Are there height differences between substitutes? A: Yes. Most parts have a maximum seated height of 2.00 mm. EEF-CX0D331R is 1.90 mm (lowest). EEF-LX0D331R and EEF-LX0D331R4 are 2.10 mm (highest). Verify PCB clearance requirements before selection.

Q: Which substitute is recommended for new designs? A: EEF-SX0E331ER (Active status, 2.5 V upgrade) or EEF-SX0D331E4 (Active status, 4.5 mOhm ESR) are preferred for new designs. Both offer Active product status and improved specifications compared to the Not For New Designs original part.

Q: Do all substitutes maintain the same package footprint? A: Yes. All substitutes use the 2917 (7343 Metric) surface mount package with identical land dimensions (0.287" L x 0.169" W / 7.30 mm x 4.30 mm), ensuring PCB compatibility without layout changes.

Q: What is the significance of ESR differences? A: ESR affects ripple current handling and thermal performance. Lower ESR (3–4.5 mOhm) reduces heat generation and supports higher ripple currents, beneficial for high-frequency switching applications. Higher ESR (9–15 mOhm) is acceptable for general-purpose applications with lower ripple current demands.

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